aphesis

/ˈæfəsɪs/
noun
  1. The gradual loss of an unstressed vowel or syllable from the beginning of a word, often leading to a new standard form.
    • The word 'special' underwent aphesis from the earlier form 'especial'.
    • Aphesis explains why we say 'squire' instead of 'esquire' in everyday language.
    • Many common English words like 'mend' (from 'amend') are results of aphesis.
Synonyms
What does "aphesis" mean? | whatsthatwordmean | whatsthatwordmean